By the way - the auction was so secret that it was in the newspaper and online.
Then why did you think you had to post it? I have never understood what positive outcome is expected to come from posting a live auction - it always seems to cause some controversy, which is why the 'rules' (more like guidelines & suggestions) were discussed sometime ago - follow those suggestions and there never seems to be any problems.
Explain to me who you expect to appreciate your posting? The people already aware of the auction and serious about bidding certainly won't. The casual observer will probably be more indifferent than anything and would probably be just as happy to see it posted after it's over. A person who didn't see it and wins something might, but if the auction were just for a single gun that would be at the most just one person, and everyone else will either not care or be unappreciative (and some possibly to a great extent). Even a person who wins might end up having second thoughts later and then wish they never had heard of the auction, so it could end up without anyone be happy about it.
From what has gone on here in the past I don't see much of an upside to posting live auctions, at least here (and I do not see that changing) - most who would be serious bidders always seem to already know and whether posting it affected the biding any or not, most will probably assume it did.